Chip-Level Laser
Chip-level lasers are born! Ability to emit light with a basic linewidth of less than 1Hz! Spectral pure lasers are at the heart of advanced scientific and commercial applications due to their ability to produce near-perfect monochromatic light. This ability of the laser is measured based on its linewidth or coherence, that is, the ability to emit a constant frequency over a period of time before the frequency changes. In practice, researchers are doing their utmost to make highly coherent, near-unipolar lasers for advanced systems such as atomic clocks. However, today these lasers are bulky and occupy the rack of equipment, they can only be used in the laboratory workbench. There is currently a trend to transfer the performance of advanced lasers to photonic microchips, which can be applied to a wide range of applications such as spectroscopy, navigation, quantum computing, and optical communications while significantly reducing cost and size. Achieving suc...